MultiMax is a uniquely designed two sizes in one earplug. Features a narrow taper at one end, a wide taper at the other-giving you two sizes in one and making inventory control easy. Insert either end into ear canal for greater comfort and protection. Smooth, soil resistant skin helps prevent dirt from adhering to the surface while rolling prior to insertion. NRR 31dB. Tested to ANSI S3.19-1974 standard. 200 pair per box. Sold by the Box.